ESPHome based AUX AC PCBA arrived – and failed (a bit)

First batch of 3104-00 ESPHome AUX AC PCBAs arrived!

Some basic initial testing was done:

• supplying with 5V didn't damage the PCB
• output of the regulator was stable at 3.3V
• it was possible to program the ESP32 over UART and later over WiFi

Next step – testing with AC!

EDIT:

Testing with AC – passed, the device communicates with AC.

ISSUES:

• Connector pitch wrongly selected: 2.54mm instead of 2.00mm
• Pinout wrongly assigned – TX and RX swapped